This is, sadly, false. It may be true that anyone cool would ignore such things, but there are plenty of companies and recruiters out there that will consider this kind of thing a red flag and downvote people during the recruiting process. (Edit: this comment has been getting upvoted and downvoted in equal proportions, which kind of supports my point. It's an ugly truth, what I'm saying here.)

Oh sure, some people will discriminate against you, but you need very few jobs relative to the number available.

That's a great point. And perhaps working for cool people is better. Maybe the doors it closes are doors best left closed.

But it's a great filter to avoid the types of employer who would repeat the aggravation OP was experiencing.

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